Crank-rod bearing.



P. F. STAUFFER.

CRANK ROD BEARING.

APPLICATION FILED Ammo, 1911.

1,046,889. Patented Dec. 10, 1912.

WITNESSES: I 1

FLOYD F. STAUFFEB, OF DALLAS, TEXAS, ASSIGNOR OF ONE-HALF T0 WILLIAM J.

GLYNN, 01? DALLAS, TEXAS.

CRANK-BOD BEARING.

Application filed. April 20, 1911. Serial No. 622,329.

LOMLSSQ.

B is employed to operate a pneumatic bellows, consisting of a stationaryupper member O, and a movable lower member D, the two being connected bya fabric E, which forms an air receptacle within the bellows. A T shapedbracket F, having an aperture G extending upwardly into its verticalportion, is centrally mounted upon the bellows member D. The aperture Greceives the upper extremity of a rod H, which hasits lower extremitythreaded into a bearing member J, receiving the upper half of the crankB. A spring K is coiled upon the rod H and has its extremities abuttingagainst the bracket F, and the bearing member respectively, the latterbeing held in constant contact with the crank B by the action of saidspring. The lower half of the bearing is formed by amemberL, which isheld in the proper position relative to the member by a rod M, the upperextremity of which is threaded into the bracket F, and the lowerextremity bent at a rightangle, and extended into said member L, holdingthe same in a rigid relation to the bracket F.

From the above description it is apparent that a rotation of the crank Bwill produce a vertically reciprocating motion of the bellows member D,the latter at the same time undergoing a rocking or oscillating motion.A sufficient space will intervene between the bearing members J and L toallow the for mer to approach the latter as the bearing gradually wears.

In the modified form of the invention shown in Fig. 3, the vertical rodH is made somewhat shorter, and has not connection directly with thebracket F. The upper extremity of said rod passes loosely throng anaperture in a block N, which block is clamped upon the rod M by means ofa set screw 0. This arrangement permits adjustment of the amount ofcompression in To all whom it may concern:

Be it known that T, FLOYD F. STAUFFER, a citizen of the United Stat-es,residing at Dallas, in the county of Dallas and State of Texas, haveinvented certain new and useful Improvements in Crank-Rod Bea-rings, ofwhich the following is a specification.

My invention relates to new and useful improvements in crank rodbearings, an relates more particularly to an improvement in the crankrod bearings of a rotary bellows pump, such as are commonly used inautomatic pianos.

The object of the invention is to provide a crank rod bearing that willalways fit closely to the crank, means being provided to compensate forthe wear, which tends to produce a loose bearing after a considerableperiod of operation.

The object is more specifically to provide a crank rod bearingconsisting of two spaced members, one of which maintains a fixedrelation to the crank rod, while the other is acted upon by a spring,which produces a constant close contact, and prevents a loose {it due towear.

Finally the object of the invention is to provide a crank rod bearingthat will be strong, durable, simple, and efficient, and comparativelyeasy to construct, and one that will operate noiselessly for a longperiod of time and with little friction.

With these and various other objects in view, my invention has relationto certain novel features of the construction and operation, an exampleof which is described in the following specification, and illustrated inthe accompanying drawing, wherein:

Figure 1 is a front view of a crank, and a crank rod connectingtherewith through the bearing herein described, and serving to operate abellows, the latter being shown in its compressed condition. Fig. 2 is aside elevation of the same. Fig. 3 is a view in the spring K, since byloosening the setside elevation, showing a somewhat modified screw 0,the block N may be moved up and down upon the rod M as described.

When the above described crank rod bearing is used as part of a rotarybellows pump mechanism, the preferable material for the bearing memberswill be hard fiber. It is obvious, however, that the application of thedevice is not limited to rotary bellows pumps, and the invention is,therefore, preform of the invention, means being provided to readilyadjust the pressure acting upon the adjustable member of the bearing.

Referring now more particularly to the drawing wherein like letters ofreference designate similar parts in all the figures, the letter Adenotes a crank shaft, and B the crank therein. The rotation of thecrank the compression of the spring, and a body the last-named rod, andadapted to receive a reciprocating In a device of the characterdescribed, the combination With a crank, of a pair of Washington, D. 0.

to the other bearing member, a. body adapted to receive a reciprocatingmotion from the crank through the last specified rod, a bracket rigidlysecured to said body to Which bracket said rod has rigid connection, asocket being provided in said bracket in end of the rod resting upon thecorrelated bearin member and the other upon the bracket.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

FLOYD F. STAUFFER. Witnesses:

